20122020111 has 4 divisors (see below), whose sum is σ = 26829360152. Its totient is φ = 13414680072.

The previous prime is 20122020109. The next prime is 20122020137. The reversal of 20122020111 is 11102022102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20122020111 - 2¹ = 20122020109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122020211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353670016 + ... + 3353670021.

It is an arithmetic number, because the mean of its divisors is an integer number (6707340038).

Almost surely, 2^20122020111 is an apocalyptic number.

20122020111 is a deficient number, since it is larger than the sum of its proper divisors (6707340041).

20122020111 is an equidigital number, since it uses as much as digits as its factorization.

20122020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707340040.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20122020111 its reverse (11102022102), we get a palindrome (31224042213).

The spelling of 20122020111 in words is "twenty billion, one hundred twenty-two million, twenty thousand, one hundred eleven".